Extension ladder hook



Sept. 15, 1931. 51M. PETERS ET AL 1,923,510

EXTENS ION LADDER HOOK Filed March 1929 IN V EN TORS BY QB. We

A TTORNEYS.

Patented Sept. 15, 1931 UNITED STATES PATENT OFFICE SPENCER M. PETERS AND ARTHUR. B. ROCHESTER, F SPRINGFIELD, ILLINOIS; SAID ROCHESTER ASSIGNORTO SAID PETERS EXTENSION LADDER HOOK Application filed March 27, 1929. Serial No. 350,343.

Our invention relates to books and catches operatively connected with'extension ladders for the general purposes of holding the extension members of the ladder substantially in supported position on the rungs or steps of the stationary member wherever the movable member may be moved in its slidable adjustments up and down.

A further purpose of our invention is to provide in a hook construction a means for freely passing the hook over each successive step or rung as the extension member moves up but which will automatically register in position to catch and hold any of the successive rungs or steps as the moving member comes downward unless purposely held to prevent it from catching.

A further purpose of our invention is to provide an extension ladder hook having catch members on each side with integral connection, working together always and having catches for both the steps or rungs and stop hooks for engaging the ladder stiles to help hold the weight of the extension mem- 25 her and whoever may be on it.

We attain the objects of our invention with the device described in the annexed specification, recited in the claims and illustrated in the accompanying drawings in which like 0 reference numerals indicate like parts in the several figures.

Referring to the figures:

Fig. 1 is a perspective of my extension ladder hook.

Fig. 2 is a cross section showing how the catiches engage a ladder step and the ladder sti es.

Fig. 3 is a horizontal cross section of an bolted to stiles 4 and 5 of an extension member .6 of an extension ladder with a stationary member 7.

Our extension ladder hook works with efiiciency on extension ladders having either round rungs or metallic channel bar rungs,

for the stop members l and 2 are adapted to engage either of these types of steps snugly by their hooks 8 and 9 While on the same stop members are hook members 10 and 11 which engage the front face edge of the ladder stiles 4:- and 5 when hooks 8 and 9 have engaged a step -12- of the stationary member 7- in the support of the extension member of the ladder to which it is operatively pivoted.

The extension member of the ladder lifts the hook members -8 and -9 with it, as it is slidably moved upwards and when the top surface of these hooks strike the next step of the stationary ladder member, the hooks and U bar or channel bar 3- pivotally trip outwardly and slide over the step and then pivotally drop back again into position for engaging the top of the step just passed over, if it is desired to let the extension member of the ladder rest on this step.

A particular merit of our invention resides in its construction permitting both hook members to be simultaneously controlled by their integral assembly with U or channel bar 3; a convenience that is often a big advantage in handling an extension ladder while extensions are being made in it.

Having thus described the salient features of our invention what we claim is:

1. An extension ladder hook comprising in combination a bar having a U-shaped cross section and bent at the ends to form a U- shaped bar, a pair of angular hook members movably pivoted to the inner face of said bent ends of said bar, each of said hook members having its middle portion in a plane with said bent ends, one of its ends bent outwardly at right angles to said middle portion and a twist in said hook to form the opposite end in a downwardly bent position to form a relatively wide hook for engaging ladder rungs.

2. In combination with an extension ladder having two slidably connected sections an extension ladder hook comprising in combination a bar having a U-shaped cross section and bent at the ends to form a U-shaped bar, a pair of angular hook members movably pivoted to the innerface of said bent ends of said bar, each of said hook members having its middle portion in a plane with said bent ends, one of its ends bent outwardly at right angles to said middle portion and a twist'in said hook to form the opposite end ina downwardly bent position to form a relatively wide hook for engaging ladder rungs. v

Ill-Witness whereof, we hereunto set our hands this 23rd day of February, 1929.

SPENCER M. PETERS. ARTHUR B. ROCHESTER. 

